MarkView Bar Code Generator Tuning Parameters

Issue

• What are the best settings for the Barcode Generator?

Resolution

1. The Barcode format of PNG has a much smaller packet size than GIF, and so is optimal.
   The MV_PREFERENCE setting is 'MVAS_BCG_FILE_FORMAT', and can be set via MarkView Administration.
   NB: The following browser versions support PNG:
   Netscape Navigator 4.7 with the Quicktime plug-in (Note: The background prints light grey.)
   Netscape Navigator 7
   Microsoft Internet Explorer 5.0 and higher
2. Rollup several barcode requests into one (1) request, by concatenating the parameters. For example: http://<server>.domain.com:7777/servlet/markview.BarCode?text=D&text=F&text=G&text=H
3. Adjust minimum dispatchers to 50:
   The MV_PREFERENCE setting is 'MVAS_BCG_MIN_DB_DISPATCHERS', and can be set via MarkView Administration).
4. Adjust maximum dispatchers to 50:
   The MV_PREFERENCE setting is 'MVAS_BCG_MAX_DB_DISPATCHERS', and can be set via MarkView Administration).
5. Adjust buffer size upward (at least 32000):
   The MV_PREFERENCE setting is 'MVAS_BCG_BUFFER_SIZE', and can be set via MarkView Administration).
6. Adjust initial and maximum java heap size upward, within bounds of virtual memory on the server:
   • -Xms sets the initial heap size, and is in the form:
     -Xms256M
   • -Xmx sets the maximum heap size, and is in the form:
     -Xmx512M

     Note: There is no space between the parameter and the value.

     Note: These parameters are to the java engine, and so are specified before the OC4J jar file: java -Xms256M -Xmx512M -jar oc4j.jar or java -Xms256M -Xmx512M -jar orion.jar

7. Periodically trim all OC4J logfiles:
   1. OC4J log file (usually specified by the -out parameter when starting OC4J)
   2. OC4J error file (usually specified by the -err parameter when starting OC4J)
   3. j2ee/home/log/global-application.log
   4. j2ee/home/log/http-web-access.log (in OC4J 1.0.2, it is named j2ee/home/log/default-web-access.log)
   5. j2ee/home/log/jms.log
   6. j2ee/home/log/rmi.log
   7. j2ee/home/log/server.log